Force-feeder for grease-cups.



' F. MASON.

FORCE FEEDER FOR GREASE CUPS.

APPLICATION FILED APR. 24. I916.

152%]. 55 1 u Patented Apr. 3, 1917.

EYE: i.

FRED MASON, OF SPRINGFIELD, MISSOURI.

FORGE-FEEDER FOR GREASE-CUPS.

Specification of Letters Patent.

Patented Apr. 3, 1917.

Application filed. April 24, 1916, Serial no. 93,187.

To all whom it may concern:

Be it known that I, FRED MASON, a citizen of the United States, residing at Springfield, in the county of Greene and State of Missouri, have invented certain new and useful Improvements in Force-Feeders for Grease-Cups; and I do declare the following to bee. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates broadly to lubricators for locomotives or other engines, but more particularly to a form of force feeder for grease cups.

The principal object of the invention is to provide a force feeder having elements of construction which insure it against being inadvertently dislodged from the grease cup and lost.

Another object of the invention is to provide a force feeder which is adapted to be retained by the grease within the cup against dislodgment from the cup.

A further object of the invention is to provide a device of this character which will be of simple, strong, durable and inexpensive construction, efficient and reliable in operation, and well adapted for the purpose for which it is designed.

With these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings in which similar reference characters designate like parts throughout the several views:

Figure 1 is a central vertical longitudinal sectional view through a grease cup showing a force feeder constructed in accordance with this invention appliedthereto;

Fig. 2 is a side elevation of the force feeder detached from the cup;

Fig. 3 is a top plan view of the same and Fig. 4 is a bottom plan view of the same.

Referring more particularly to the drawings, the reference character 1 designates an internally threaded grease cup with which the invention is designed to be used. This grease cup 1 may be of any suitable design, and it is provided with means for attachment to the article desired to be lubricated,

and is further provided with a grease outlet 2.

Adjustably connected with the grease cup 1 is an externally threaded force feeder or plug 3. The outer end of the plug 3 is provided with means whereby it may be en gaged to be rotated, here shown in the form of a square-shaped socket or recess A.

Projecting inwardly from the inner end of the plug 3 is a cylindrical stem 5, the latter having its longitudinal axis coincident with the longitudinal axis of the plug 3, as clearly shown by the drawings. Arranged on the stem 5 is a helical anchoring blade or screw 6 of as many convolutions as may be desired, the number here shown as being three. The distance between the diametrically opposite sides of the blade 6 is slightly less than the diameter of the plug 3, for a purpose to be described.

It frequently occurs that the force fed plugs of grease cups which are subjected to considerable vibration are displaced from their cups by virtue of the fact that after the cups are freshly filled, the plugs cannot ordinarily be screwed down into the cups more than three or four turns. This fre quently does not furnish a sufficient engagement for the plug andthe vibration disloc g'es it from the cup. In the use of the present invention, however, this dislodgment is prevented by virtue of the fact that when the cup is filled with grease and the plug screwed into place, a certain amount of the grease will be forced up and around the screw or blade 6. This result may be readily understood, owing to the fact that the lubricant generally used in cups of this character is thick and viscid, or in other words, semi-solid, it being ordinarily an oil of great density.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of the invention will be readily understood without a more extended explanation.

As various minor changes in form and proportion and the minor details of construction may be resorted to without departing from the spirit of this invention, I do not wish to be limited to the precise construction herein shown and described other than that set forth in the appended claims.

I claim: a

the grease in the cup to prevent accidental separation of thetwo. 1

'2. The combination with a grease cup and a feed plug having a threaded connection 7. therewith, of an anchoring screw carried by the inner end of said plug to thread into the grease in the cup to prevent accidental separation of the two, and a grease outlet fro n said-cup. V

' 3. Thecombination with agrease cup and a feed plug having a threaded connection therewith, of a stem projecting axially from the inner end of the plug, and a helical blade surrounding said stem to thread into the grease in the cup to prevent accidental separation of said cup and plug, and a grease outlet from said cup.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRED MASON.

Witnesses:

W. B. LINNEY, LUOILE BUOKNER.

Gopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

' Washington; D. G. 

